Thank you for your message.
can I use the very same .EXE file to install to PC-B, and PC-C etc..... or must I set up a new one every time?
Yes, you can configure a "One-Click" installer and then mass-deploy your custom Host on as many computers as you need. The output .exe file is a self-extracting Host installer with your custom settings, so remote users will only need to run the file to install Host on their computers.
There is no need to configure a new "One-Click" package every time. In case each Host needs to have unique settings, simply install the original Host and manually change the Host settings on each remote PC.
Here are our Documentation articles that might be helpful:https://www.remoteutilities.com/support/docs/one-click-package/https://www.remoteutilities.com/support/docs/about-msi-configurator/
Please let me know if you have more questions.